Lens device

Abstract

The lens device includes a lens portion, an operation ring that has a first gear portion and a second gear portion and that operates movement of the lens portion, and a fixing member that is fixed to the lens barrel and that supports movement of the lens portion in an optical axis direction. The fixing member and the operation ring are relatively moved while sliding on each other, and a sliding portion slides on the convex portion formed on at least any one of the fixing member or the operation ring.

What is claimed is: 
     
         1 . A lens device comprising:
 a lens portion;   an operation ring that has a first gear portion and a second gear portion and that operates movement of the lens portion; and   a fixing member that is fixed to a lens barrel and that supports movement of the lens portion in an optical axis direction, the fixing member and the operation ring being relatively moved while sliding on each other by a sliding portion,   wherein the sliding portion includes a convex portion formed on at least any one of the fixing member or the operation ring.   
     
     
         2 . The lens device according to  claim 1 ,
 wherein the operation ring includes a first operation ring that has the first gear portion, a second operation ring that has the second gear portion, and a connecting member that connects the first operation ring and the second operation ring and converts rotations of the first operation ring and the second operation ring into the movement of the lens portion in the optical axis direction, and   the sliding portion slides on the convex portion formed on at least any one of the fixing member or the connecting member.   
     
     
         3 . The lens device according to  claim 1 ,
 wherein the fixing member includes a guide groove that guides the movement of the lens portion by suppressing rotation of the lens portion with rotation of the operation ring.   
     
     
         4 . The lens device according to  claim 1 ,
 wherein the sliding portion includes a first sliding portion and a second sliding portion,   as viewed in a direction intersecting an optical axis of the lens portion,   the first sliding portion is disposed in a region from a position facing the first gear portion toward a subject side, and   the second sliding portion is disposed in a region from a position facing the second gear portion toward an image forming side.   
     
     
         5 . The lens device according to  claim 1 ,
 wherein the sliding portion includes a first sliding portion and a second sliding portion, and   the first sliding portion and the second sliding portion are disposed such that a first reaction force in the first sliding portion and a second reaction force in the second sliding portion, which are generated in a case where an external force is applied to at least any one of the first gear portion or the second gear portion, are in the same direction.   
     
     
         6 . The lens device according to  claim 4 ,
 wherein, as viewed in the direction intersecting the optical axis of the lens portion,   the first sliding portion is disposed closer to the subject side than the first gear portion, and   the second sliding portion is disposed to have an overlapping region with the second gear portion.   
     
     
         7 . The lens device according to  claim 1 ,
 wherein a first module of the first gear portion and a second module of the second gear portion have different sizes.   
     
     
         8 . The lens device according to  claim 7 ,
 wherein the first module is larger than the second module.   
     
     
         9 . The lens device according to  claim 3 ,
 wherein, as viewed in a direction intersecting an optical axis,   the first gear portion is disposed inside the guide groove.   
     
     
         10 . The lens device according to  claim 4 ,
 wherein the first gear portion and the second gear portion are formed in a circumferential direction of the operation ring,   the first gear portion has a larger diameter than the second gear portion, and   the first sliding portion has a smaller width than the second sliding portion.